Comparison

ASHRAE Psychrometric Chart vs Bluebeam

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

ASHRAE Psychrometric Chart

This interactive tool allows users to plot and customize psychrometric charts on their iPad. Easily create and save HVAC process graphs, update properties dynamically, and share charts and data via email. Supports both IP and SI units.

Highlights
  • Interactive psychrometric chart plotting
  • Customizable chart appearance
  • Dynamic property updates
  • Create and edit points and labels
  • Email charts and data
  • Unlimited projects and templates
  • Zoom and pinch functionality
Features
Read full description

The HVAC Psychrometric Chart app is the first truly interactive graphical psychrometric chart for the iPad, and it includes both IP and SI units. It is now optimized for iOS 16. Using your finger, you can easily plot HVAC and other psychrometric processes on the iPad screen while you are out in the field, save the graphs, and then email the graph and results to yourself or clients. The HVAC Psych Chart app includes the following features and functionality: 1. Displays a fully customizable psychrometric chart in both landscape and portrait modes. 2. Allows you to customize the graph in many different ways including specifying the psychrometric chart line colors, chart background color, hide/display status of chart lines, point colors, process line colors, units of graph values, and the min/max limits of the chart. 3. Using your finger, you can plot as many points as you want on the screen. As you move your finger around the graph, the psychrometric properties at the top of the screen dynamically update . In addition, you can double-tap a point to display the point properties and then edit them. 4. Create psychrometric processes by plotting points then connecting them with process lines. Also, create custom labels anywhere on the chart. 5. After you have completed creating the chart, you can email a list of all the points and their properties along with a PDF of the chart, itself. 6. Create an unlimited number of psychrometric chart projects. Also, you can create templates that you can reuse over and over again. 7. Zoom in or out of the chart by "pinching" the iPad screen so as to view items in more detail. 8. Display sensible heat ratio (SHR) line 9. Display psych process line as curved along 100% RH line.

About

Bluebeam

Access and collaborate on PDF documents directly from your mobile device. Communicate project updates with markups and work offline by syncing files. Seamlessly join live collaboration sessions and manage document revisions from the field.

Highlights
  • Real-time PDF collaboration
  • Markup and annotation tools
  • Offline file access
  • Document syncing
  • Studio Project management
  • Live session joining
Features
Read full description

Bluebeam for iOS keeps you connected to your teams and documents, so you can quickly access the information you need in the field and capture what matters for the office. - Communicate with markups using tools like callouts, text, clouds, and status indicators - Import your team's custom Tool Sets from Revu, so your standardized markups are ready to go in the field, even offline - Attach photos captured in the field directly to a markup, so supporting documentation stays organized without cluttering your drawings - Open your files stored on your device, Studio Projects, or Studio Sessions - Join Studio Sessions for live collaboration. If your connection drops, your changes sync when you're back online - Check out files in Studio Projects to make edits, then check them back in when you're ready - Work offline by syncing Project files ahead of time or opening PDFs stored on your device Whether you’re reviewing submittals, placing markups in the field, or tracking revisions with your team, Bluebeam gives you the flexibility to get the job done from anywhere.

Screenshots

Bluebeam4 screens

Verdict

The call

The clearest difference is price: Bluebeam at Free against ASHRAE Psychrometric Chart's $19.99. Bluebeam also leads on update cadence (monthly vs every 11 months). ASHRAE Psychrometric Chart's advantage is review sentiment (27% vs 3%) and iOS requirement (13.0 vs 18.0). On ads, in-app purchases and device support there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Bluebeam is free to download; ASHRAE Psychrometric Chart costs $19.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

ASHRAE Psychrometric Chart ships an update every 11 months, Bluebeam monthly. The most recent releases landed on November 1, 2026 and November 7, 2026 respectively.

Scorecard5 real differences · 5 level
ASHRAE Psychrometric Chart versus Bluebeam: the parameters behind the verdict, then further details
ParameterASHRAE Psychrometric ChartBluebeam
Price$19.99Free — better
Rating—1.5 (412 ratings) — better
Positive reviews27.3% of reviews — better2.9% of reviews
Number of ratings—412 — better
Update frequencyEvery 11 monthsMonthly — better
AdsNoNo
In-app purchasesNoNo
MonetizationPaidFree — better
DevicesiPadiPhone, iPad — better
Requires iOS13.0 — better18.0
Further details — not scored
Size2 MB295 MB
Age rating4+4+
DeveloperASHRAE, Inc.Bluebeam, Inc.

Customer experience

ASHRAE Psychrometric Chart

Written reviews11 reviews
Positive27.3%
Neutral27.3%
Negative45.5%

Bluebeam

All ratings406 ratings
Positive9.9%
Neutral2.0%
Negative88.2%
Written reviews245 reviews
Positive2.9%
Neutral2.9%
Negative94.3%

Bugs and requests

ASHRAE Psychrometric Chart

Not enough reviews yet to summarise bugs or requests.

Bluebeam

Reported bugs

28 issues
  • Markups fail to load or display correctly
  • App deletes markups instead of saving them
  • Documents wipe clean when reopened
  • Files uploaded disappear from app
  • Corrupted file errors when opening PDFs
Show 23 more
  • Keyboard disappears during login
  • Selection boundaries too large, preventing precise markup selection
  • Apple Pencil input stops working intermittently
  • Pen tool produces no line output despite input
  • App crashes when opening large file sets
  • Session documents fail to load
  • Blank PDF pages displayed
  • Scaling doesn't work properly
  • Blue screen errors
  • Markups missing after checkout and checkin
  • Incomplete markups syncing between devices
  • App freezes during document checkin
  • Unable to add users to sessions
  • Projects not showing up in app
  • App crashes when opening Studio sessions
  • Drawings won't load or open
  • Markup placement doesn't correspond to tap location
  • PDF goes blank when inserting callouts
  • Constant logout requiring re-authentication
  • Links to details don't work
  • App crashes on older iOS versions
  • Audio communication issues
  • File synchronization failures

Requested features

25 requests
  • Restore measurement and scaling tools
  • Add custom toolsets and tool libraries
  • Implement bookmarks for document navigation
  • Enable image embedding in callouts
  • Add undo/redo functionality
Show 20 more
  • Support multiple PDF tabs simultaneously
  • Create stamp library with standardized markups
  • Add dimension markup capabilities
  • Allow local PDF file access and import
  • Full Studio session integration
  • Improve Apple Pencil responsiveness and precision
  • Add eraser tool for pen markups
  • Enable photo capture and attachment to markups
  • Support Dropbox and cloud storage integration
  • Add form field editing capabilities
  • Implement punch list and defect tracking
  • Add RFI creation functionality
  • Support for custom columns and data fields
  • Reset viewpoints feature
  • Pen width and cloud shape customization
  • Settings menu for preferences
  • Better pen and drawing mechanics like Notability
  • Ability to download session documents to device
  • Support for opening PDF attachments from desktop
  • Batch file upload capability

In-app purchases

None

ASHRAE Psychrometric Chart

No in-app purchases

None

Bluebeam

No in-app purchases

Questions

Is ASHRAE Psychrometric Chart free?
ASHRAE Psychrometric Chart costs $19.99, with no in-app purchases.
Is Bluebeam free?
Bluebeam is free to download, with no in-app purchases.
Do ASHRAE Psychrometric Chart or Bluebeam have ads?
Neither ASHRAE Psychrometric Chart nor Bluebeam shows ads.
Which is updated more often, ASHRAE Psychrometric Chart or Bluebeam?
ASHRAE Psychrometric Chart ships an update every 11 months, and Bluebeam monthly. Most recently, ASHRAE Psychrometric Chart was updated on November 1, 2026 and Bluebeam on November 7, 2026.

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